V2L discharge specs, 60Hz output on Australian MG MG4 EV

[domwild]

I couldn't find anything about standards that govern V2L output specifications for the MG MG4 in Australia. To me, the MG is a mobile inverter which can deliver AC power to loads and wouldn't be any different to a standalone inverter hooked up to a battery.

I recently got a V2L adapter and one of the first things I did was plug in a power meter that can measure voltage, current, power, PF, frequency.

I was a bit surprised at the output readings.

1. No load voltage is 215Vac (which is a bit low for Australian standards). Minimum is 218V up to 252V (240V +5%/-10%)
2. Frequency is 60Hz, which is more alarming because Australian grid frequency is 50 Hz.

Some appliances will malfunction or fail at 60Hz.

Just wondering if anyone else has picked up on this? I will be emailing MG for their comments on this.

The 215VAC is not surprising as I read it is the Chinese standard of 220VAC, but the 60Hz is perhaps a worry for computers??

 

[decrep]

to my knowledge, with computers, mains goes straight into the power supply, and converted to DC.
My transformer theory is ancient, but there's something about having too much iron in the core if the frequency is high. Maybe heats the transformer up, and runs less efficiently.
But I doubt it would be a major concern on a short term basis.
I think motors would be a bigger worry, both for voltage and frequency. I'd be monitoring them for heat build up.

 

[haloweenhamster]

It's been 15 years for me but I remember transformers having 10% more capacity on 60hz than 50hz

Frequency is normally a close tolerance
Voltage can vary

There's little these days that'll be effected by frequency

Switch mode PSU's are generally 0-100hz 70-260v input, that way mass produced items can be used anywhere which is the most common now

Transformers are more of an issue with ones designed for 60hz being overloaded on 50hz, also they're voltage dependant

Motors obviously go a different speed

Is the v2l ok with inductive loads anyway?

 

[domwild]

Was told by an expert with name Wattmatters that 220VAC is the Chinese standard, the Aussie one is 230VAC ± 7%?

 

[wattmatters]

Was told by an expert with name Wattmatters that 220VAC is the Chinese standard, the Aussie one is 230Vc PLUS/MINUS 7%?

Chinese mainland standard AC power is 220 V / 50 Hz. I don't what know their standard voltage operating range is though.

Australian grid standard is 230V / 50 Hz. The voltage range standard is +10% (253 V) to -6% (216 V).

Note that Western Australia is a separate grid and operates with a 240 V / 50 Hz standard, +/- 6% (225-253 V).

While the Australian standard is meant to be centred around 230 V, the reality is in many locations the supply is still closer to the older 240 V standard.

In many areas it can be higher, e.g. this is the grid voltage for our supply over the last seven days:

Average of 248.6 V, with a low of 244.4 V and a max of 252.4 V.

Somewhat bizarrely, our voltage peaks are consistently occurring during the evening peak demand period.

 

[decrep]

Somewhat bizarrely, our voltage peaks are consistently occurring during the evening peak demand period.

Possibly because of an intermittent nature of high peak demand?
It's not all A/C on permanently, there'd be cooking appliances going on and off randomly. So a sudden loss of load could create a higher peak voltage, that the system can't respond to very quickly?

 

[wattmatters]

Possibly because of an intermittent nature of high peak demand?

These are averages for the hour, intermittent fluctuations are already filtered out.